CVE-2026-52910

A flaw was found in the Linux kernel's Berkeley Packet Filter (BPF) reuseport mechanism. When a cBPF program is detached from a reuseport group, it is freed immediately without waiting for Read-Copy-Update (RCU) readers to complete. This can lead to a use-after-free condition, resulting in memory corruption (specifically, an out-of-bounds read) if another thread is simultaneously sending UDP packets to the reuseport group.

This CVE has been rated as Moderate because eBPF is restricted to root-only on Red Hat Enterprise Linux.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.